Re: please... help me about grubby!

[Chris Murphy]

On Sat, Jun 15, 2019 at 3:24 PM François Patte
 wrote:
> parttion in the     /boot/grub2/grub.cfg file

That location tells me this is BIOS GRUB (not UEFI GRUB). I also
suggest making sure the pre-boot GRUB binaries are up to date before
you convert to BLS or upgrade to Fedora 30, by using 'grub2-install
/dev/' pointed at the proper boot device (whole block device, not
partition).

If you're multibooting another distribution, only you can know if
there's a risk of stepping on the existing bootloader.

The reason is particularly old pre-boot GRUB binaries can run into
trouble with BLS. It's sufficient to run 'grub2-install' from Fedora
29 to avoid that trouble.